Tidal Fences

Like tidal turbines, tidal fences take advantage of fast-flowing tidal streams but instead of being individual submerged turbines, the turbines are held within a barrage.

The current is forced to flow past the turbines, causing them to rotate, which in turn powers generators which create electricity. The generators and cabling can be positioned above the barrage, out of the water, where they are easily accessed.

To harness the most power from the water, the barrage has to completely block the channel so it has been found that this technology is most suitable between small islands, rather than in an estuary where it would halt the flow of the river.

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